<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<style>
    .box{
        width:100px;
        height:100px;
        background:#ccc;
    }
    .wrap {
        background:yellow;
    }
    .wrap h1{
        background:pink;
        margin:40px;
    }
</style>
<body>
    <div class="box">box</div>
    <div class="wrap">
        <h1>h1</h1>
    </div>
</body>
</html>